<template>
  <div class="article-container">
    <!-- 导航栏 -->
    <van-nav-bar class="page-nav-bar" left-arrow title="黑马头条"></van-nav-bar>
    <!-- /导航栏 -->

    <div class="main-wrap">
      <!-- 加载中 -->
      <div v-if="isLoading" class="loading-wrap">
        <van-loading color="#3296fa" vertical>加载中</van-loading>
      </div>
      <!-- /加载中 -->

      <!-- 加载完成-文章详情 -->
      <div v-else-if="articles.title" class="article-detail">
        <!-- 文章标题 -->
        <h1 class="article-title">{{articles.title}}</h1>
        <!-- /文章标题 -->

        <!-- 用户信息 -->
        <van-cell class="user-info" center :border="false">
          <van-image class="avatar" slot="icon" round fit="cover" :src="articles.aut_photo" />
          <div slot="title" class="user-name">{{articles.aut_name}}</div>
          <div slot="label" class="publish-date">{{articles.pubdate|formatDate}}</div>
          <!-- 关注取关组件 -->
          <!-- <ArtUserFollowed @updaFollowed="articles.is_followed = !articles.is_followed" :aut_id="articles.aut_id"
            :is_followed="articles.is_followed" /> -->
          <ArtUserFollowed :aut_id="articles.aut_id" v-model="articles.is_followed" />
          <!--
            v-moder可以解析俩个操作
            一是解析为属性 :value="articles.is_followed" 进行父向子传值进行绑定、
            二是解析为自定义事件 @input="articles.is_followed =$event" 进行触发自定义事件赋值
             -->
        </van-cell>
        <!-- /用户信息 -->

        <!-- 文章内容 -->
        <div ref="content" class="article-content" v-html="articles.content"></div>
        <van-divider>正文结束</van-divider>
        <!-- 文章评论列表组件 -->
        <AeticleComment @click-reply="clickReply" :list="list" @updataTotal="conNumber=$event" type="a"
          :source="articles.art_id" />
      </div>
      <!-- /加载完成-文章详情 -->

      <!-- 加载失败：404 -->
      <div v-else-if="is404" class="error-wrap">
        <van-icon name="failure" />
        <p class="text">该资源不存在或已删除！</p>
      </div>
      <!-- /加载失败：404 -->

      <!-- 加载失败：其它未知错误（例如网络原因或服务端异常） -->
      <div v-else class="error-wrap">
        <van-icon name="failure" />
        <p class="text">内容加载失败！</p>
        <van-button @click="loadArticleItem" class="retry-btn">点击重试</van-button>
      </div>
      <!-- /加载失败：其它未知错误（例如网络原因或服务端异常） -->
    </div>

    <!-- 底部区域 -->
    <div v-if="articles.title" class="article-bottom">
      <van-button class="comment-btn" type="default" @click="isShowCommentPopup = true" round size="small">写评论
      </van-button>
      <van-icon name="comment-o" :badge="conNumber" color="#777" />
      <ArticleColl :art_id="articles.art_id" v-model="articles.is_collected" />

      <!-- <van-icon color="#777" name="good-job-o" /> -->
      <!-- tabar 点赞文章组件 -->
      <ArticleTabarGood @updataTab="articles.attitude=$event" :articles="articles" />
      <van-icon name="share" color="#777777"></van-icon>
    </div>
    <!-- /底部区域 -->

    <!-- 评论弹层 -->
    <van-popup v-model="isShowCommentPopup" position="bottom">
      <!-- 对文章进行评论 -->
      <ArticlePost @onpostSuccuss="onPostSucc" :target="art_id" />
    </van-popup>

    <!-- 回复评论弹层 -->
    <van-popup v-model="isShowproCommentPopup" style="height:100% " position="bottom" >
      <!-- 回复评论的评论 -->
      <ArticleReplyPost @repClose="isShowproCommentPopup=false" :comment="comment" v-if="isShowproCommentPopup" />
    </van-popup>

  </div>
</template>

<script>
import { getArticleInfo } from '@/api/article'
import { ImagePreview } from 'vant'
import ArtUserFollowed from '@/components/art_userFollowed'
import ArticleColl from '@/views/article/components/articleCollected.vue'
// 文章评论列表组件
import AeticleComment from './components/articleComment.vue'
import ArticleTabarGood from './components/articleTabarGood.vue'

import ArticlePost from './components/article-post.vue'
import ArticleReplyPost from './components/articleReply-post.vue'

export default {
  name: 'articless',
  props: {
    art_id: {
      type: String
    }
  },
  data () {
    return {
      // 控制artcomment的数组渲染
      list: [],
      articles: {},
      isLoading: false,
      is404: false,
      conNumber: 0, // 评论总条数
      isShowCommentPopup: false, // 控制弹层
      isShowproCommentPopup: false, // 回复评论弹层
      comment: {}

    }
  },
  methods: {
    // 发布评论，关闭弹层
    onPostSucc (e) {
      this.list.unshift(e)
      this.isShowCommentPopup = false
    },
    // 获取新闻内容数据
    async loadArticleItem () {
      this.isLoading = true
      try {
        const res = await getArticleInfo(this.art_id)
        console.log(res)
        this.articles = res.data.data
        this.isLoading = false
        // 数据驱动是异步的
        await this.$nextTick()
        this.previewImg()
        // this.$nextTick(() => {
        //   this.previewImg()
        // })
      } catch (err) {
        // 判断是否404错误
        if (err.response && err.response.status === 404) {
          this.is404 = true
          this.isLoading = false
        }
      }
    },
    // 图片预览逻辑
    previewImg () {
      console.log(this.$refs.content)
      const imgs = this.$refs.content.querySelectorAll('img')
      const images = []
      imgs.forEach((item, index) => {
        images.push(item.src)
        item.addEventListener('click', () => {
          ImagePreview({
            images,
            startPosition: index
          })
        })
      })
    },
    clickReply (e) {
      this.isShowproCommentPopup = true
      this.comment = e
      console.log(this.comment)
    }
  },
  computed: {},
  watch: {},
  filters: {},
  components: {
    ArtUserFollowed,
    ArticleColl,
    AeticleComment,
    ArticleTabarGood,
    ArticlePost,
    ArticleReplyPost

  },
  created () {
    // console.log(this.$route)
    this.loadArticleItem()
  },
  mounted () {

  }
}
</script>

<style scoped lang="less">
.article-container {
  .main-wrap {
    position: fixed;
    left: 0;
    right: 0;
    top: 92px;
    bottom: 88px;
    overflow-y: scroll;
    background-color: #fff;
  }
  .article-detail {
    .article-title {
      font-size: 40px;
      padding: 50px 32px;
      margin: 0;
      color: #3a3a3a;
    }

    .user-info {
      padding: 0 32px;
      .avatar {
        width: 70px;
        height: 70px;
        margin-right: 17px;
      }
      .van-cell__label {
        margin-top: 0;
      }
      .user-name {
        font-size: 24px;
        color: #3a3a3a;
      }
      .publish-date {
        font-size: 23px;
        color: #b7b7b7;
      }
      .follow-btn {
        width: 170px;
        height: 58px;
      }
    }

    .article-content {
      padding: 55px 32px;
      /deep/ p {
        text-align: justify;
      }
    }
  }

  .loading-wrap {
    padding: 200px 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #fff;
  }

  .error-wrap {
    padding: 200px 32px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: #fff;
    .van-icon {
      font-size: 122px;
      color: #b4b4b4;
    }
    .text {
      font-size: 30px;
      color: #666666;
      margin: 33px 0 46px;
    }
    .retry-btn {
      width: 280px;
      height: 70px;
      line-height: 70px;
      border: 1px solid #c3c3c3;
      font-size: 30px;
      color: #666666;
    }
  }

  .article-bottom {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    justify-content: space-around;
    align-items: center;
    box-sizing: border-box;
    height: 88px;
    border-top: 1px solid #d8d8d8;
    background-color: #fff;
    .comment-btn {
      width: 282px;
      height: 46px;
      border: 2px solid #eeeeee;
      font-size: 30px;
      line-height: 46px;
      color: #a7a7a7;
    }
    .van-icon {
      font-size: 40px;
      .van-info {
        font-size: 16px;
        background-color: #e22829;
      }
    }
  }
}
</style>
